nsaunier/traffic-intelligence: python/moving.py comparison

added norm functions for Point and accessor methods for MovingObject

author	Nicolas Saunier <nico@confins.net>
date	Tue, 18 May 2010 17:35:09 -0400
parents	418b41056e6c
children	e47168f6b694

comparison

equal deleted inserted replaced

-:911b52744ceb
+:0d321c23d337
 >>> Point(3,4)-Point(1,7)
 (2.000000,-3.000000)
 '''
 return Point(self.x-other.x, self.y-other.y)
+def norm2Squared(self):
+'''2-norm distance (Euclidean distance)
+>>> Point(3,2).norm2Squared()
+13
+'''
+return self.x*self.x+self.y*self.y
+def norm2(self):
+'2-norm distance (Euclidean distance)'
+return sqrt(self.norm2Squared())
+def distanceNorm2(p1, p2):
+'''
+>>> Point.distanceNorm2(Point(3,4),Point(1,7))
+3.6055512754639891
+'''
+return (p1-p2).norm2()
 def aslist(self):
 return [self.x, self.y]
 class Trajectory:
 '''Class for trajectories
 self.type = type
 # compute bounding polygon from trajectory
 def length(self):
 return self.timeInterval.length()
+def getPositions(self):
+return self.positions
+def getVelocities(self):
+return self.velocities
+def getPositionAt(self, i):
+return self.positions[i]
+def getVelocityAt(self, i):
+return self.velocities[i]
 def getXCoordinates(self):
 return self.positions.getXCoordinates()
 def getYCoordinates(self):

Mercurial > hg > nsaunier > traffic-intelligence